One of the areas of the Chancel contains an altar. I was trying to climb along the wall to the left of the altar to explore the area where the candles were, and my character fell into a non-area of the game and got stuck. I couldn't commit suicide, I couldn't jump out of it, and I couldn't move enough out of the game to die. I only lost a few min. by reverting to a saved game but just wanted to pass it along.